50-Dollar Follow Focus (FDFF) is a cool gadget that can boost your DSLR videography to a new level, professional one or not. What it does is allow you to precisely and smoothly control the focus of your DSLR lens during video recording. Check out the video below and the Kickstart project page for 50-Dollar Follow Focus to pre-order yours for $60 (not a typo, shipping does cost extra).